NGWS SDK Documentation  

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Compiler Error C3816

'declaration' : forward declarations and/or definitions do not have the same attribute 'attribute'

A forward declaration and an actual declaration require that there be no conflicts or inconsistencies in the declaration of attributes.

The following sample generates C3816:

#using <mscorlib.dll>

class C1;

// try the following line to resolve the error
// __gc class C1;

__gc class C1{  // C3816, forward declaration does not use __gc
};

void main() {
}